肝硬化癌变时腹水的特征是（） A.淡黄色漏出液 B.血性腹水 C.乳糜液 D.草绿色

Hi Jane,

I hope you and your family are all well. I'm e-mailing you to tell you about my new hobby, surfing.

My brother, Peter, is at home from college(大学)for the summer holiday. He is very good at surfing. We go to the beach every day and Peter teaches me to surf. I don't do well in it but it's fun. Most days we bring a picnic and stay on the beach all day. Surfing is a good exercise and an interesting way to get a suntan(晒黑)! All my friends think it's a great new hobby.

Bye for now.

Love,

Rose

小题1:Who is the e-mail from?

A．Jane

B．Rose

C．Peter

D．Love小题2:What is Peter?

A．He is a middle school student.

B．He is a surfing teacher.

C．He is a college school student.

D．He is a surfing player.小题3:What does Rose like now?

A．exercising

B．e-mailing

C．surfing

D．picnic

关于手部深度烧伤的特点，叙述错误的是（）

A.手掌损伤多于手背损伤

B.常波及深筋膜、肌腱、关节，易出现功能障碍

C.后期常见瘢痕增生挛缩致继发性畸形

D.手为暴露部位，受伤概率小

E.常不需要进行手术植皮治疗

北京奥运会主体育场的外形像鸟巢，硼烷的结构也像鸟巢，故称为巢式硼烷，五硼烷（B₅H₉）为传统火箭燃料，燃烧产物对环境污染小，其燃烧方程式为： 2B₅H₉+12O₂5X+9H₂O，则X的化学式为 [ ]

A．B₂O₅

B．B₁₀H₉

C．B₂O₃

D．B₁₀O₁₅

均数的抽样误差是（）

A.个体观察值和样本均数之差

B.个体观察值和总体均数之差

C.个体观察值和个体观察值之差

D.样本均数和样本均数之差

E.样本均数与总体均数之差

集散型控制系统中的功能块有（）。

A、存储功能块

B、输入/输出功能块

C、控制功能块

D、开关功能块